East Stump Lake
Nelson County, North DakotaView mapDirections
Not enough samples to grade — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. No letter yet. Here is what we do have.
- Limited data
East Stump Lake in Nelson County, North Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8.5 ft visibility. Chlorophyll-a (algae): 37.9 µg/L.
- Clarity
- 8.5 ft
- Typical in August
- 61°F
- Trend
- ↓ Declining
Stays via Stay22
Stays near East Stump Lake
Compare lakeside cabins, hotels, and vacation rentals near East Stump Lake in Nelson County, North Dakota — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near East Stump Lake
Prices for Sep 11–13, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at North Dakota’s top lakes →
Watch East Stump Lake’s letter
Email me if this lake’s grade moves. Grades stay free.
Or email
Why East Stump Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For East Stump Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity and algae (chlorophyll-a), but not phosphorus.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by NDDEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
East Stump Lake is a lake in Nelson County, North Dakota. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, NDDEQ, last sampled 2025-10-13. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for East Stump Lake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 8.5 ft. Chlorophyll-a 37.9 µg/L. TSI 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | 37.9 µg/L | Not graded |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Water Temperature
East Stump Lake typically sits around 61°F at the surface in August. Summer average is about 63°F. Usually warmest in Jul (about 70°F) and coldest in May (about 43°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 18 field readings (2020–2025) via the EPA Water Quality Portal. See the full East Stump Lake water temperature breakdown →
Fishing East Stump Lake
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -5.18 m/yr | 5 |
| Phosphorus | ↓ Declining | +30.25 µg/L/yr | 4 |
| Chlorophyll-a | ↑ Improving | -6.43 µg/L/yr | 4 |
Graded lakes near East Stump Lake
East Stump Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Nelson County
Frequently asked questions about East Stump Lake
Where is East Stump Lake?
- East Stump Lake is a lake in Nelson County, North Dakota. LakeQuality has not rated this lake (UNRATED) — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity.
What is the water quality grade for East Stump Lake?
- East Stump Lake in Nelson County, North Dakota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8.5 ft visibility. Chlorophyll-a (algae): 37.9 µg/L.
Is East Stump Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
What is the water temperature of East Stump Lake?
- East Stump Lake typically sits around 61°F at the surface in August, from 18 EPA Water Quality Portal field readings (2020–2025). That is a typical value for the month, not a live reading.
Explore East Stump Lake across LakeQuality
Species activity outlook by water temperature and season
Top lakes and where to stay in the Devils Lake Region area
Where to stay at North Dakota's top lakes, each with its grade
North Dakota's cleanest and most-polluted lakes, ranked
More North Dakota Lake Rankings
Other Lakes in North Dakota
Eutrophic Lakes in North Dakota
Where this data comes from
17 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North Dakota Department Of Environmental Quality
21NDHDWQ_WQX17 samples · 2020–2025
Analytical methods
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- 447.0 ~ EPA; Chlorophyll a and b in phytoplankton by HPLC/UV
- 4500 NO3 E ~ Nitrate in Water- Cadmium Reduction
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.